30 CFR § 75.1912
Fire suppression systems for permanent underground diesel
fuel storage facilities.
(a) The fire suppression system required by § 75.1903
shall be an automatic multipurpose dry chemical type (ABC) fire suppression
system listed or approved as an engineered dry chemical extinguishing
system by a nationally recognized independent testing laboratory and
appropriate for installation at a permanent underground diesel fuel
(1) Alternate types of fire suppression systems shall be approved
in accordance with § 75.1107-13
of this part.
(2) The system shall be installed in accordance with the
manufacturer's specifications and the limitations of the listing or
(3) The system shall be installed in a protected location or
guarded to prevent physical damage from routine operations.
(4) Suppressant agent distribution tubing or piping shall be
secured and protected against damage, including pinching, crimping,
stretching, abrasion, and corrosion.
(5) Discharge nozzles shall be positioned and aimed for maximum
fire suppression effectiveness in the protected areas. Nozzles must
also be protected against the entrance of foreign materials such as
mud, coal dust, and rock dust.
(b) The fire suppression system shall provide automatic fire
detection and automatic fire suppression for all areas within the
(c) Audible and visual alarms to warn of fire or system faults
shall be provided at the protected area and at a surface location which
is continually monitored by a person when personnel are underground. In
the event of a fire, personnel shall be warned in accordance with the
provisions set forth in § 75.1502
(d) The fire suppression system shall deenergize all power to the
diesel fuel storage facility when actuated except that required for
automatic enclosure and alarms.
(e) Fire suppression systems shall include two manual actuators
located as follows:
(1) At least one within the fuel storage facility; and
(2) At least one a safe distance away from the storage facility and
located in intake air, upwind of the storage facility.
(f) The fire suppression system shall remain operational in the
event of electrical system failure.
(g) Electrically operated detection and actuation circuits shall be
monitored and provided with status indicators showing power and circuit
continuity. If the system is not electrically operated, a means shall
be provided to indicate the functional readiness status of the
(h) Each fire suppression system shall be tested and maintained in
accordance with the manufacturer's recommended inspection and
maintenance program and as required by the nationally recognized
independent testing laboratory listing or approval, and be visually
inspected at least once each week by a person trained to make such
(i) Recordkeeping. Persons performing inspections and tests of fire
suppression systems under paragraph (h) shall record when a fire
suppression system does not meet the installation or maintenance
requirements of this section.
(1) The record shall include the facility whose fire suppression
system did not meet the installation or maintenance requirements of
this section, the defect found, and the corrective action taken.
(2) Records are to be kept manually in a secure manner not
susceptible to alteration or recorded electronically in a secured
computer system that is not susceptible to alteration.
(3) Records shall be maintained at a surface location at the mine
for one year and made available for inspection by an authorized
representative of the Secretary and miners' representatives.
(j) All miners normally assigned to the active workings of the mine
shall be instructed about the hazards inherent to the operation of the
fire suppression systems and, where appropriate, the safeguards
available for each system.